Stella is tired of her sewing machine continually breaking down. The threading mechanism takes her significant time to fix every time and sometimes causes tears in the fabric so she has to start over. The current machine cost her mother $575 many years ago. A local repair shops says the machine can be maintained for $125 per year, which will allow it to be used heavily for three more years. A replacement sewing machine will make things more efficient and Stella will be able to make an additional 3 swimsuits per hour. A new industrial sewing machine costs $1,400 and Stella is unsure of how she would depreciate it. If she opens the store, she will need two sewing